u/Gilladian

A group of wizard cultists in a megadungeon were worshippers of an aberrant god of oozes, labyrinths and madness. Eventually they all died (I suspect a suicide pact in the face of collapse of their cult). However, due to their leader's fanaticism, some became undead, focused on slaying all who arrive in the area who do not meet the criteria of their foretold "new leader". What criteria would identify this new leader? the old worshippers were humans/demihumans of the ordinary sorts. Be as weird as you like!